<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
</head>
<body>
	<dialog open>	<!-- 对话信息.没有open默认不显示 -->
		<dt>老师</dt>
		<dd>1+1=?</dd>
		<dt>学生</dt>
		<dd>1+1=2</dd>
		<dt>老师</dt>
		<dd>真棒！</dd>
	</dialog>
</body>
</html>